PHOTOS: It Girls Gather To Celebrate Gossip Girl’s 100th Episode

Gossip Girl sure knows how to attract the cool young things. At last night’s soiree celebrating the series’ 100th episode (woo syndication!), Blake Lively, Leighton Meester, and crew were joined by the awesome one-two punch of Chloe Moretz and Karlie Kloss. Whatever did they wear?!

Lively arguably owned the red carpet in an intricate Marchesa dress, dripping in fringe and revealing a fair amount of her torso. Meester seemed a bit uncomfortable in strapless white Balmain, while Michelle Trachtenberg wore a ton of Erickson Beamon baubles and Kelly Rutherford looked as elegant as ever in a metallic silver number with gray feather detailing. As for the super cool guests not in the cast, 14-year-old Moretz opted for an age-appropriate head-to-toe Stella McCartney ensemble that included tights, and Kloss chose a graphic black and white frock.